The preparation of tailored carrier gas mixtures typically involves the following steps: 1. Selection of Gases: Based on the specific catalytic process, gases are selected for their properties and roles. 2. Mixing Ratios: The proportions of each gas are determined to achieve the desired effects on the reaction. 3. Purity: High purity gases are chosen to avoid contamination and undesired side reactions. 4. Delivery System: Specialized equipment ensures the accurate delivery of the gas mixture to the reactor.